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FfC. KIRCHNER A8c W. H. WASHBURN.

DOOR SBCURBR. No. 350,437.

Figi.

WITNESSES www Patented Oct. 5, 1886.

./iTTORNEI/'S UNITED STATES PATENT OFFICE.

FREDERICK C. KIRCHNER AND WILLIAM HENRY WAsIIRURN, 0E NEW YORK, N. Y.

DOOR-SECURER.

SPECIFICATION forming part of Letters Patent No. 350,437', dated October5, 1886.

Application filed-August 19, ISEG. Serial No. 211,302. (No model.)

To all whom it 11ml/ concern:

Be it known that we, FREDERICK C. KIRCH- NER and WILLIAM HENRY WAsHEURN,both citizens of the United States, residing at ing is a specification.

This invention relates to an improvement in doorfasteners; and itconsists in certain novel features of construction, fully pointedl outin the following specification and claims, and illustrated in theaccompanying drawings, in which- Figure l shows our device applied: to adoor.I Fig. 2 is a side view thereof. Figs. 3 and 4 are details.

Similar lettersindicate corresponding parts.

In the drawings, the letter A designates a door which closes inftheusual way against thejamb B.

C is the lock secured tothe door, the bolta of which passes behind thecatch D on the jamb when the door is locked.

Eis the main plate or frame of our fast-V ener, which is placed betweenthe door and the jamb in such a way that when the former is locked the'bolt a will pass through an Opening, b, inthe inner end of the plate E.In the outer end of this plate is a slot, c, the sides of whichformguides for the sliding clamp F, which is acted on by a thumb-screw,G, tapped into the head-piece d. The clamp is provided on its sides withgrooves e,which engage the sides of the slot c, and serve to hold itfrom slipping out of the same.

The operation of our deviceis as follows: The plate E is insertedbetween the door and the jamb in such a way that when the door is lockedthe bolt a will pass through the opening b. The clamp F is then moveddown the slot c by the screw G until one of the legs f on the same willrest on the lock C, and the other on the catch D, when by the continuedaction of the screw the inner edge of the opening b will be forcedagainstthe bolt a, and draw the latter against the inner face of thecatch D with sufficient force to prevent it from being shoved back, orfrom being unlocked by means of a key until relieved from the action ofour fastener.

When the door to which our device isto be applied has its lock on theoutside, the clamp F is used,as shown in Fig. 1-that is, the legs fpress against the lock and the catch, so as to rest rrnly against thebody of each; but when the door is provided with a mortisel/ogfthe clamp is reversed, so thatitsrsnxiooth side rests against both thedoorsurface and thej'amb,a1'id will not deface or indent them.

To diminish the area of the opening b, a f

slide, g, is secqredtg the plate E by a screw, h, which passes through asl`ot`,`,"'in"this slide, and through the plate E, and istightened 'byannutj. I

To facilitate the insertion and withdrawal of the clamp F from the slotc, a recess, 7c, is cut into one of the sides of lthe latter, so thatwhen the thumb-screw is turned back the clamp can be taken out, eitherfor the purpose of reversing or for packing the parts togethermorecompactly for purposes of transportation.

By the device above described a door-fastener is provided by means ofwhich any door having` either a surface or a'mortise 'lock can besecurely fastened without injury either to the door or to the lock.

What we claim as new, and desire to secure by Letters Patent, isg 1. Ina door-fastener, the combination,with the plate E, having an opening,I), for the passage of the lock-bolt, of the clamp F,mov ably attachedto said plate, and means, substantially as described, for actuatinglsaid clamp, substantially as set forth.

I 2. The combination, with the plate E,.hav ing an opening, b, for thepassage of thelockbolt, and a slot, c, of the clamp F, constructed toslide in said slot, and the screw G, adapted to act on said clamp,substantially as de-v scribed.

In testimony whereof we have hereunto set our hands and seals in thepresence of two subscribing witnesses.

FREDERICK C. KIRCHNER. [L S.] WILLIAM II, WASHBURN. [L 8.]

